Academic journal article Research Quarterly for Exercise and Sport

Relationships between Cerebral Blood Flow, Functional Status, and Leisure Time Energy Expenditure in Older Adults

Academic journal article Research Quarterly for Exercise and Sport

Relationships between Cerebral Blood Flow, Functional Status, and Leisure Time Energy Expenditure in Older Adults

Article excerpt

Bonita L. Marks, Laurence M. Katz, Patty Daniel, Jamie Albo, and Adam Bruck, University of North Carolina--Chapel Hill (marks@email.unc.edu)

Cerebral blood flow (CBF) and cognitive function both decline with aging. Since current brain imaging techniques are expensive as well as invasive, the purpose of this study was to determine the relationships between functional assessments and cerebral blood flow as measured by noninvasive transcranial doppler (TCD). Eighteen community-dwelling, healthy older adults (65-83 years old) participated in TCD testing (baseline rest followed by verbal: spatial cognitive tasks). Participants also completed the AAHPERD 1/2-mile walk, a timed 20-ft walk, time to rise from a chair, and a verbal recall of current leisure time physical activity (LTPA). They were stratified into three groups: Group 1 (n = 5): below 700 kcal/week; Group 2 (n = 7): 1,360-1,979 kcal/week; Group 3 (n = 6): above 2,400 kcal/week. ANOVAs with Tukey post hoc tests (p [less than] .05) revealed that Group 1 took significantly longer to complete the 20-ft walk (5.7 [plus or minus] 1.5 s) and took more steps (9.8 [plus or minus] 1.9) in comparison to Group 3 (4.1 [plus or minus] 0.6 5; 7.7 [plus or minus] 0.8 steps). Left-sided baseline CBF was significantly lower in Group 3 (34. …

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